You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you today?

USER: I would like to book a ticket from HOU to IAH, can you please help me out?

ASSISTANT: Sure, can I know your planned travel dates?

USER: I am travelling on these dates Aug 5th and 7th.

ASSISTANT: Do you have any other specifications?

USER: I prefer return time in the evening.

ASSISTANT: May I know your name please?

USER: Jonathan Adams here.

ASSISTANT: Unfortunately there is no flight found with your given information.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for availing us.