You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Raymond Smith.

ASSISTANT: How may I guide you today?

USER: Please book a fight ticket on dates 02/04 and 02/06.

ASSISTANT: Can you please share your source and destination airport codes?

USER: My airport codes are DEN and LAS.

ASSISTANT: Do you have any class preference?

USER: No, I am ok with any class.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any specifications?

USER: I want to return at evening.

ASSISTANT: I found a ticket for you with price of 100, flight number is 1001 in economy class and connection is 1. Is it ok for you?

USER: Yes, please book a ticket for me.

ASSISTANT: I confirmed your ticket successfully.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.