You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Melisa Lee.

ASSISTANT: How may I help you?

USER: I want to book a flight ticket from MSP to PHX. Can you help me?

ASSISTANT: Sure, can you please let me know your travel dates?

USER: Sure, my planned trip dates are on Feb 02 and return on Feb 04.

ASSISTANT: Ok, please let me know your class preference.

USER: No, but I want to depart in the afternoon time.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no flight available as per your given travel dates.

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

ASSISTANT: You are welcome and thank you for choosing us.