You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Angela Philips.

ASSISTANT: How may I assist you today?

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

ASSISTANT: Sure, please wait a moment I will check the reservation status.

USER: Sure.

ASSISTANT: Thanks for waiting, we did not found any reservation by this name.

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

ASSISTANT: Thank you.