You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I need to book a ticket from PHX to LAS. Could you book a ticket?

ASSISTANT: Sure, can you share me your travel dates?

USER: Departure is Oct, 5 and return date is Oct, 7.

ASSISTANT: Do you have any connection limit?

USER: I would be comfortable with single stop over.

ASSISTANT: Please let me know if you have any other specifications.

USER: I would like to return in the evening.

ASSISTANT: Can I know your good name?

USER: My name is Gregory Adams.

ASSISTANT: Sorry, no flights are found on your travel dates.

USER: Thank you.

ASSISTANT: Thank you for reaching us.