You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I need to travel IAD and PHX, can you reserve flight ticket?

ASSISTANT: Sure, on what dates are you planning to travel?

USER: My travelling dates are Mar,30 and Apr,01.

ASSISTANT: How many connections do you need?

USER: I prefer one connecting flight.

ASSISTANT: Any other requirements to be met?

USER: No.

ASSISTANT: Please forward your name.

USER: Myself Emma Thomas.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my journey. Thank you for the information.

ASSISTANT: Thank you for opting us.