You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Raymond Baker.

ASSISTANT: How can I assist you today?

USER: I need to visit Los Angeles urgently to meet my grand father. So please check for flight availability with connection 0.

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Sure, I need to travel on dates of 08/14 and 08/16.

ASSISTANT: Please provide your airport codes that you want to travel.

USER: Sure, I would like to travel from DEN to LAX.

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there is no flights available under your preferable details.

USER: Oh! It is sad to hear. Anyway, I will choose another agency this time. Thank you for your time.

ASSISTANT: Welcome, have a great day.