You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket from IAD to LAX, can you please help me?

ASSISTANT: Ok, please can I know your name to proceed further?

USER: Sure, please book the ticket under the name Melissa Thompson.

ASSISTANT: Ok, can I know the dates of journey to proceed?

USER: I planned my journey on the dates Jan 1 and 3 respectively.

ASSISTANT: Ok, is there any class preference?

USER: No, I am happy with any class.

ASSISTANT: Ok, please can I know your other specifications?

USER: No, other specifications. Thank you for asking. Please go through booking .

ASSISTANT: Sorry, there are no flights available as per your need to book a ticket.

USER: No issue, I will go with other agency. Anyway thank you for checking.

ASSISTANT: Thank you for choosing our agency.