You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Jacob Martin. I would like to change an existing reservation due to my plan to meet my girl friend got post pone. Can you help me with this?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Wait for  a moment I will check the reservations on your name and get back to you.

USER: Sure.

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

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thanks for contacting us.