You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Owing an emergency  want to change my reservation, can you help me with it please?

ASSISTANT: Sure, may I know your name?

USER: My name is Kevin Allen.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry for the trouble which is caused to you, there is no reservation found with your name in our system data to change the travelling dates.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for reaching us.