You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Stephen Adams. Owing an emergence, I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, we are here to help you. Wait for some time I will check the reservations on your name and get back to you.

USER: Ok.

ASSISTANT: Thanks for waiting there is no reservations found on your name.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thanks for contacting us.