You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I amend you today?

USER: I am Timothy Harris. I want to modify my journey dates in my existing reservation which was reserve to Washington. Can you help me out?

ASSISTANT: Sure, I am ravish to help you.

USER: Thank you.

ASSISTANT: Please, wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Not an issue. Thank you for your kind information.

ASSISTANT: Thank you for contacting us.