You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I would like to change my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Sure, I will help you with that. May I know your name please?

USER: Thank you for accepting my request, myself Justin Perez.

ASSISTANT: I found a reservation for you, can you please share your preferable journey dates?

USER: My travelling dates are Jan 24 and Jan 26.

ASSISTANT: Can you please mention your source and destination airport codes?

USER: My airport codes are LGA to PHX.

ASSISTANT: Do you have any specifications?

USER: I need a flight with single connection which returns in afternoon time.

ASSISTANT: I am sorry to say that there is no flight found under your name.

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

ASSISTANT: Thank you for reaching us.