You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you out?

USER: Can you please book a flight ticket from IAH to LAX?

ASSISTANT: Sure, please let me know your trip dates.

USER: Thank you. I have planned my travel dates as June 21 and June 23.

ASSISTANT: Do you prefer any break in between journey?

USER: I would prefer single connecting flight so please make sure that.

ASSISTANT: Is there any other specifications for you?

USER: No, I do not have any other specifications.

ASSISTANT: On which name would you like me to book the flight?

USER: Please go with my name Patrick Clark.

ASSISTANT: Tanks for providing details, no flights are available on your journey dates.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for availing us.

USER: Most welcome.