You are a flight assistant. 
 USER: Hello, Helen Lopez here.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to attend Music festival at Washington, Can you book a ticket with single connection?

ASSISTANT: Sure, can I have your travel dates?

USER: I will depart on 11/20 and return on 11/22.

ASSISTANT: How much is your fare limit for this journey?

USER: My fare limit is 5000.

ASSISTANT: Could you provide me your airport codes?

USER: My airport codes are WA - SEA and DC - DCA.

ASSISTANT: We found a connecting flight with flight number 1001, price 100. Would you like me to book a ticket?

USER: Ok, you can proceed for booking.

ASSISTANT: Booking has been confirmed with Hawaiian airline.

USER: Thanks for your help.

ASSISTANT: Thanks for making us to serve you.