You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Alexander Robinson here. I would like to travel from LAX to CLT, can you help me out?

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

USER: My trip dates are start from 09/21 and return on 09/23.

ASSISTANT: Please wait for a minute.

USER: Sure.

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

USER: Oh! not an issue.

ASSISTANT: Thank you for contacting us.