You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I have to attend an event at Houston, could you please help me to book my flight ticket from OAK to IAH?

ASSISTANT: Sure, I will help you with booking, can you please share your travelling dates?

USER: Sure, I will depart on 08/26 and also please book the return ticket on 08/28.

ASSISTANT: Sorry for the inconvenience, no flights as per your details.

USER: Not an issue, I will find an other way to travel.

ASSISTANT: May I know your name please?

USER: Sure, my name is Paul Phillips.

ASSISTANT: Thank you.

USER: You are welcome.