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

ASSISTANT: Hello, how can I help you today?

USER: I would like to travel from DCA to ORD. can you please help me to book a ticket?

ASSISTANT: Sure, when are you willing to travel?

USER: My travelling dates will be on 03/29 to 03/31.

ASSISTANT: Ok, any other requirements?

USER: I need a connecting flight.

ASSISTANT: Ok, no flights found with your given details.

USER: Not an issue, thank you.

ASSISTANT: Thank you for reaching us.