You are a flight assistant. 
 USER: Hi, Ruth Young here.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to watch live music concern at Washington, DC - IAD. Can you please book a ticket from PHX?

ASSISTANT: Sure, do you have any price limit?

USER: As my budget is low, I can spend 200 only.

ASSISTANT: Help me with the dates of your journey?

USER: I have to depart on 04/15 and return on 04/17.

ASSISTANT: Thank you for the details, we do not find any flights running on your preferred dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.