You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: Myself Joseph Miller. I would like to attend my sister's wedding at Houston, could you please help me to book my flight ticket from IAH to HOU?

ASSISTANT: Sure, Please help me with your travel dates.

USER: Sure, I have to depart on 08/14 and also please book my return ticket on 08/16.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Oh! Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for opting us.

USER: You are welcome and thank you for choosing us.