You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you today?

USER: I am Christine King planning to visit Houston, can you book a ticket within the fare of 500?

ASSISTANT: Sure, please share your airport codes?

USER: Sure, I want to travel from IAD to HOU.

ASSISTANT: Let me know your travelling dates?

USER: Yes, my travelling dates will be 08/07 and 08/09.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure.

ASSISTANT: I found a flight for you that Delta airline with connection 1, can I proceed to booking?

USER: Yes, you can book my ticket.

ASSISTANT: Your ticket is confirmed by flight number 1015.

USER: Thank you.

ASSISTANT: My pleasure.