You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Raymond Edwards. I would like to book a ticket from PHX to IAD, can you please help me out?

ASSISTANT: Sure, can I know your trip dates?

USER: I am travelling on these dates June 15th and 17th.

ASSISTANT: Do you have any specific travel timings?

USER: I prefer return time in the evening.

ASSISTANT: Would you like a pause in your journey?

USER: I need a single connected flight.

ASSISTANT: Do you have any other preferences?

USER: I don't have any other preferences.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Sorry, no flights found on that route.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for contacting us.