You are a flight assistant. 
 USER: Hello, I am Christopher Lewis.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit white house at Washington DC - DCA.

ASSISTANT: Ok.

USER: Can you help me to book a connecting flight?

ASSISTANT: Sure, I will help you, may I know your travelling dates?

USER: I want to travel on 01/25 and recur on 01/27.

ASSISTANT: Could you please mention your airport codes?

USER: I want to board from Los Angeles, CA - LAX.

ASSISTANT: Please mention your price limit.

USER: I can afford up to 500.

ASSISTANT: There is a AA 1003 airline with fare of 100 which matches your travelling dates. Shall I proceed with booking?

USER: Please proceed.

ASSISTANT: Your booking has been confirmed on name of Christopher Lewis.

USER: Thanks for your kind assistance.

ASSISTANT: Thank you for approaching us.