You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I need to travel from Washington, DC - IAD to attend a birthday party at Austin, TX - AUS. Can you help me with the booking?

ASSISTANT: May I know your dates of journey please?

USER: I intend to fly on 05/12 and return on 05/14.

ASSISTANT: Let me know how much can you spend for flight ticket.

USER: I can spend up-to 500.

ASSISTANT: Please wait a moment, I will let you know the information of flight and revert to you.

USER: Sure.

ASSISTANT: We are sorry to inform, there is no connecting flight found on your given dates.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.