You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Andrew Phillips. I need your help in booking of a flight ticket from LAX to IAD for an important business meeting, can you please help me out with booking of a flight ticket on those locations?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: Thank you, I want to take off on 01/20 and please confirm my return ticket also on 01/22.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: I could not find any flight with your travelling dates.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: My pleasure.