You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Larry Martin.

ASSISTANT: How can I help you today?

USER: I want to travel from DEN to SFO in the month of July, can you please book a flight ticket for me?

ASSISTANT: Can I know your dates of journey?

USER: Sure, I want two tickets. One is my departure on 07/04 and the return ticket on 07/06 dates.

ASSISTANT: Sorry Larry, I did not find any flight basing on your details.

USER: It's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.