You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jerry Brown here.

ASSISTANT: How can I assist you today?

USER: I need your assistance in booking of a flight ticket to Las Vegas, can you do this for me?

ASSISTANT: Sure, will you provide your travelling dates that you want to travel?

USER: My boarding is on 04/03 and I would like to return on 04/05.

ASSISTANT: Will you provide your airport codes please?

USER: Sure, I want to travel from BOS to LAS.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is no flights found under your details.

USER: Oh, so sad to hear. Anyway, I will choose another airlines to go there. Thank you for the information.

ASSISTANT: Welcome, have a great day.