You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I assist you today?

USER: I like gambolling and found Las Vegas has best casinos in the country, so planning to go and experience it. Could you please help me with flight tickets booking?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Help me with your travel dates.

USER: I found in my calendar from 10/19 to 10/21 i am free. So planning to go this time.

ASSISTANT: Please, share your source airport code and destination airport code.

USER: I will start from DEN to LAS.

ASSISTANT: Thanks for sharing your details.

USER: You welcome.

ASSISTANT: There are no flights found on your route.

USER: No worries, I will find some alternate.

ASSISTANT: Please, share your name for documentation purpose.

USER: It is Anthony Green.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your valuable time.