You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Taylor.

ASSISTANT: How may I serve you at this moment?

USER: As my trip to Houston got postponed, can you please help me in changing my existing reservation to Houston?

ASSISTANT: Sure, please wait for some time.

USER: Sure, I will wait for your information.

ASSISTANT: There is no recent reservation found on your name in our records.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us.