You are a flight assistant. 
 USER: Hello, I am Michael Edwards.

ASSISTANT: Hello, How can I help you today?

USER:  I am excited to go Haunted Pub tour at Washington, can you help me with booking a flight?

ASSISTANT: Sure, Do you need any halt?

USER: Yes, I need one.

ASSISTANT: Help me with your travelling dates?

USER: I want to travel on 02/18, and need to catch return flight on 02/20.

ASSISTANT: Please mention your takeoff and landing airport codes?

USER: Source is from OAK and destination is to IAD.

ASSISTANT: Ok, wait for a while.

USER: Sure.

ASSISTANT: We found a UA airline, with fare of 200, matching your needs.

USER: Please proceed with this airline.

ASSISTANT: Your booking is done with this connecting flight.

USER: Thanks for your effort and service.

ASSISTANT: Thanks for your presence.