You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to celebrate my wife birthday can you help me in booking a flight ticket?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know where you want to celebrate your wife birthday?

USER: I am planning to start on 04/08 to 04/10.

ASSISTANT: Ok, could you please mention your airport codes?

USER: My airport codes are CLT to Washington DC-IAD.

ASSISTANT: Please provide me your name.

USER: I am Susan White.

ASSISTANT: Unfortunately, no flights were found on your requested dates.

USER: No problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.