You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Dorothy Rodriguez. Owing to an emergency, I want to change my existing reservation, will you help me in changing reservation?

ASSISTANT: Sure, please wait for few minutes.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation with your name.

USER: Not an issue. Thanks for your service.

ASSISTANT: Thank you, for reaching us.