You are a flight assistant. 
 USER: Hi, I am Paul Green.

ASSISTANT: Hello, how may I render you today?

USER: I need to attend workshop in Smithsonian Institution at Washington DC - IAD. Can you help me to book a connecting flight?

ASSISTANT: Sure, we are gleeful to help you.

USER: Thank you.

ASSISTANT: Can you please provide your journey dates?

USER: I want to fly on 01/03 and recur on 01/05.

ASSISTANT: from where would you like to start?

USER: I want to board from Houston, TX - HOU.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We did not find any flights matching your criteria.

USER: Ok, no issues. Thanks for your kind service.

ASSISTANT: Thank you for connecting with us.