You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you now?

USER: I am Angela Jackson. Due to an emergency, I want to change my existing reservation. Will you help me in changing reservation?

ASSISTANT: Sure, please wait for a moment while I check for the reservation.

USER: Ok.

ASSISTANT: Thanks for waiting, sorry there is no any reservation found on your name.

USER: Not an issue. Thanks for your service.

ASSISTANT: Thanks for reaching us, have a nice day.