You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you help me in changing my recent reservation, as my exam is postponed?

ASSISTANT: Sure, I am here to help you. Please mention your name.

USER: I am Christine Thomas.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a reservation on your name. Please provide your new travelling dates.

USER: My trip dates are Dec 2 to Dec 4.

ASSISTANT: Ok, Kindly mention your journey airport codes.

USER: My source is IAH and destination is MCO.

ASSISTANT: Ok, Do you have any class preference?

USER: No.

ASSISTANT: Ok, please wait.

USER: Sure. I need a connecting flight which depart in afternoon.

ASSISTANT: Ok. Thank you for waiting, No flights were found with your given details.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.