You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Linda Edwards.

ASSISTANT: How may I help you?

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

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for availing us.