You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: Would you please help me in booking a ticket from PHX to LAS where I have a conference to attend.

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

USER: My planned travel dates are as follows Oct 03 and Oct 05.

ASSISTANT: May I know your name please?

USER: My name is Sarah Baker.

ASSISTANT: Is there any class preference?

USER: Yes, I would like to board a single connection flight. where the class should be in business.

ASSISTANT: Are there any more specifications in your journey?

USER: No, thank you for asking.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry to inform you that, we did not find any flights matching your preferences.

USER: No issue, thank you for your precious time.

ASSISTANT: Thank you for choosing us.