You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I need you to book a flight ticket in the month of January.

ASSISTANT: Sure, I am here to aid you. May I know your name?

USER: My name is Ronald Thompson.

ASSISTANT: Thank you. Please provide me your travel dates.

USER: January 4 and 6 are my planned travelling dates.

ASSISTANT: May I know your origin and destination airport codes?

USER: DFW and CLT are the respective airport codes.

ASSISTANT: Do you have any other requirements?

USER: I wish to return in the evening.

ASSISTANT: Sure, please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: That's ok. Thanks for your time.

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