You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Elizabeth Gonzalez.

ASSISTANT: How may I lend hand to?

USER: Owing to an emergency, I want to change an existing reservation. Could you help me in changing the reservation?

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

USER: Ok.

ASSISTANT: Elizabeth Gonzalez sorry to intimate, no reservation is found with your criteria.

USER: Not an issue. Thank you.

ASSISTANT: Thank you very much for utilizing our agency.