You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Brandon Phillips here.

ASSISTANT: Nice to meet you.

USER: Can you please help me out in booking the ticket from Washington to Houston? As I'm planning to meet my old friend after a long time.

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Sure, my departure date is 04/10 and return date is 04/12.

ASSISTANT: Please provide your airport codes that you want to travel.

USER: Yes, I want to depart from IAD and land at IAH.

ASSISTANT: Please give me a moment.

USER: Sure, I'll wait.

ASSISTANT: Thanks for waiting, there is a flight with price 400 and the connections 1 is available. Shall I confirm your ticket?

USER: I can afford upto 200 only, can you please search for a flight according to that?

ASSISTANT: There is no flights available under this budget.

USER: That's ok, thank you for your time.

ASSISTANT: Welcome, have a great day.