You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephanie King.

ASSISTANT: How can I help you?

USER: Owing to emergency I want to change my existing reservation, can you help me with that?

ASSISTANT: Please wait a moment to check the reservation status.

USER: Sure.

ASSISTANT: Sorry, no reservation found by your name.

USER: That's ok, no problem.

ASSISTANT: Thanks.

USER: Thank you for the information.