You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Jack Rodriguez. I want to change my reservation due to some problems I am not unable to travel those dates, can you please change my travel dates?

ASSISTANT: Sue. I will help you. Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation showing on your name. Welcome. Thank you for reaching us.

USER: No issue, thank you.