You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Please help me to book a flight ticket IAH to LAS.

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you share me your travelling dates?

USER: Nov, 9 and Nov, 11 are my travelling dates.

ASSISTANT: May I know your name?

USER: Ryan Gonzalez.

ASSISTANT: Do you have any other specifications?

USER: I need to return at afternoon time.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: That's why, we want to book the ticket.

ASSISTANT: Thanks for approaching us.