You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Rebecca Jackson.

ASSISTANT: How can I assist you for this day?

USER: Can you help me to change my reservation to next month? Please check.

ASSISTANT: Sorry no reservation found on your details.

USER: Oh! ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your support.

ASSISTANT: You are welcome.