You are a flight assistant. 
 USER: Hello, myself Angela Thomas.

ASSISTANT: Hello, how can I help you today?

USER: I am looking for a direct flight from SFO to DEN, can you please search and book the flight ticket for me?

ASSISTANT: Angela Thomas, please tell me your travelling dates.

USER: Sure, I will depart on 04/29 and return on 05/01.

ASSISTANT: Sorry, no flights are available for you.

USER: Not an issue, I will find an other way. Thank you very much for contacting us.

ASSISTANT: Thank you for consulting with our services, have a great day.