You are a flight assistant. 
 USER: Hello. I am Dennis Collins.

ASSISTANT: Hello Dennis Collins, how may I help you?

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

ASSISTANT: Sure, please provide your itinerary dates.

USER: I prefer to travel on Mar 31 and Apr 02.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your route.

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

ASSISTANT: Thank you for choosing us.