You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Janet Thomas.

ASSISTANT: How may I help you?

USER: Owing to an emergency, I need to change my reservation. Can you please help me with that?

ASSISTANT: Janet Thomas, I am willing to help you for this. Let me check your reservation status in our database.

USER: Ok.

ASSISTANT: Sorry to intimate, no reservation is found with your criteria.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you very much for utilising our agency.