You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Melissa Jackson.

ASSISTANT: Melissa Jackson, May I know, with which service I can serve you the best?

USER: Owing to an emergency, I need to cancel my recent reservation. Can you assist me with that?

ASSISTANT: Sure, I can assist you.

USER: Thank you.

ASSISTANT: Please wait, let me check your reservation status.

USER: Sure.

ASSISTANT: Sorry Melissa Jackson, there is no active reservation o your name to cancel it.

USER: It's ok, not an issue. Thank you for the information.

ASSISTANT:  Thanks for approaching us.