You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am a resident of Houston, planning to attend my grandparents, 60th wedding anniversary.

ASSISTANT: Ok.

USER: So,can you help me in booking a ticket with one connection limit?

ASSISTANT: Sure, may I know your good name please?

USER: I am Kevin Davis.

ASSISTANT: Let me know your travelling dates, please?

USER: I will travel on 07/22. I can afford only 500 to flight. And my return date of travel is 07/24.

ASSISTANT: Could you please provide me your airport codes?

USER: My origin is from IAH and should reach to DCA.

ASSISTANT: Thanks for giving your details, we found a flight on your details with airline AA, flight number: 1021. Shall I proceed for booking?

USER: Sure, proceed to book.

ASSISTANT: Your ticket has been booked.

USER: Thank you, I am glad at your service.

ASSISTANT: Thank you so much for choosing us.