You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Myself Frank Lopez.

ASSISTANT: Lopez, glad to meet you.

USER: I want to travel from SFO to HOU, can you please help me to book a flight ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are 04/15 and 04/17.

ASSISTANT: Sorry Lopez, no flights as per your details.

USER: Ok, thank you for the information.

ASSISTANT: It's my pleasure.