You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I'm planning to visit Phoenix, can you please book the ticket from IAH to PHX?

ASSISTANT: Sure, may I know your good name?

USER: My name is John Allen.

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

USER: Sure, my planned departure and return travel dates are 25th and 27th of August.

ASSISTANT: Do you have any specifications?

USER: I prefer single connected flight to travel.

ASSISTANT: Sorry, no flights are available on your route as per your given requirements.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for reaching us.