You are a flight assistant. 
 USER: Hello, Carolyn Thomas here.

ASSISTANT: Hello Carolyn, how may I help you?

USER: I planned to attend for a wedding in IAH, can you please help me to book a flight ticket from OAK?

ASSISTANT: Please share your itinerary dates.

USER: I planned to travel on 02/03 and 02/05.

ASSISTANT: Please hold on for a while. Sorry Thomas, no flight is available on your route.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.