You are a flight assistant. 
 USER: Hello, I am Sandra Taylor.

ASSISTANT: Hello, how can I help you?

USER: Could you please help me with booking a flight ticket to Washington on 06/29 and return on 07/01?

ASSISTANT: Sure, please share me your airport codes?

USER: Los Angeles, CA-LAX and Washington, DC-IAD are airport codes.

ASSISTANT: Are you comfortable with two connections?

USER: No, I need a single connecting flight.

ASSISTANT: Sorry there are no flights with your specifications.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.