You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name?

USER: I am Richard Johnson.

ASSISTANT: Yes, Johnson. How can I serve you?

USER: I am planning visit my cosine's home.Can you please help me out to book a ticket from PHX to CLT?

ASSISTANT: Sure, I am here to help you. Can you please provide your planned dates of journey?

USER: I would like to travel on 05/15 and return date on 05/17.

ASSISTANT: Please hold on for a second, I will revert back to you with the information about the flight.

USER: Sure, take your own time.

ASSISTANT: Sorry to say this, there is no flight to your preferable destination on your preferable dates.

USER: That's fine, thank you for your quick response and service.

ASSISTANT: Ok, thank you for choosing our service. Hope you have a great day.