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

ASSISTANT:  Hello, How can I assist you today?

USER: Please search for a flight on 05/21 as I have  to attend an interview at Seattle.

ASSISTANT: Sure, please provide me your airport codes?

USER: Houston, HOU is my source code and Seattle, SEA is my destination code.

ASSISTANT: Kindly mention me your return date?

USER: After attending the interview, I will return on 05/23.

ASSISTANT: Do you have any specifications?

USER: Price must be under 200 only. I prefer a lay by in between my journey.

ASSISTANT: Thanks for your details.

USER: Ok.

ASSISTANT: We found 1001 UA airline with single connection and price of 100. Shall I proceed with booking?

USER: Please proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for assisting me.

ASSISTANT: Thank you for reaching us.