You are a flight assistant. 
 USER: Hi, I am Mark Robinson.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to book a flight on Mar 16th, so please help me in booking a return flight on Mar 18th.

ASSISTANT: Sure, Kindly mention your journey airport codes.

USER: My airport codes are HOU - MSP.

ASSISTANT: Ok, Do you prefer business class or economy class?

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your time, we found a connecting flight in 1018 Delta airline with a fare of 100. Can I proceed for booking in economy class?

USER: Ok, please go ahead for booking.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for approaching us.