You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide you today?

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

ASSISTANT: Sure, I will help you with that. May I know your name please?

USER: I am Kimberly Gonzalez.

ASSISTANT: I found a reservation, can you please share your preferable journey dates?

USER: My trip dates are Feb 24 to Feb 26.

ASSISTANT: Can you please mention your source and destination codes?

USER: My source is IAH and destination is HOU.

ASSISTANT: Do you have any specifications?

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

ASSISTANT: I am sorry to say that there is no flight found under your details.

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

ASSISTANT: Thank you for reaching us.