You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you change my flight ticket reservation which I booked last week with your agency?

ASSISTANT: Sure, may I know your name please?

USER: I am Rachel Martin.

ASSISTANT: We found a reservation in your name. Can I have your journey details please?

USER: The airport codes are from DFW to PHX.

ASSISTANT: Help me with the trip dates?

USER: The travel dates are from 14 Dec to 17 Dec.

ASSISTANT: Do you have any airline preferences?

USER: I am looking for a normal-cost airline. I need a single connecting flight.

ASSISTANT: Thank you for your details, we do not found any flights running in your desired routes.

USER: That is not a problem. Thank you.

ASSISTANT: Thank you for reaching us.