You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am Linda Nelson. I need to book a flight ticket from IAH to PHX to meet my friends.

ASSISTANT: May I know on what dates would you like to travel?

USER: Sure, my travelling dates are 05/01 and 05/03.

ASSISTANT: May I know your departure time and arrival time?

USER: I want to depart and return in the evening.

ASSISTANT: Do you require any specifications in your journey?

USER: I need a halt in between the journey.

ASSISTANT: Sorry to inform you that unfortunately there is no flights available by the given details.

USER: No worries, thank you for the information.

ASSISTANT: Thank you.