You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I am planning to change my reservation, due to health issues, can you help me?

ASSISTANT: Sure, I'll help you in changing an existing reservation. Please let me know your name to check the reservation status.

USER: Thank you. My name is Barbra Roberts.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, we found a reservation by this name. Kindly share your update travelling dates.

USER: I am departing on Nov 05 and willing to return on Nov 07.

ASSISTANT: May I know your boarding and landing airport codes?

USER: My departure airport code is EWR and prefer to land in DTW airport.

ASSISTANT: Do you you need a break in between your journey?

USER: I need a stopover in my between my journey.

ASSISTANT: Can I know if you have any other comforts in between your journey?

USER: I prefer to travel in economy class.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, we are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for approaching us.