You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Myself Emily Thomas.

ASSISTANT: yes, Emily.

USER: I would like to change my existing reservation. Can you help me for that?

ASSISTANT: Sure, please wait for a moment.Let me check with your details.

USER: Ok.

ASSISTANT: Sorry Emily, there is no reservation under your name.

USER: Ok, that's fine.

ASSISTANT: Do you want any other reservation?

USER: No,thank you for your services.

ASSISTANT: Thank you for choosing us.