You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: I want to book a flight ticket to attend a cultural fest which is going to held at TX. Can you help me?

ASSISTANT: Sure, May I know your travelling dates?

USER: 09/27 and 09/29 are my travelling dates.

ASSISTANT: Can you share me your airport codes?

USER: SFO and IAH are my nearest airport codes.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight  to make my journey.

ASSISTANT: Is there any other preferences?

USER: No.

ASSISTANT: Can I know your name?

USER: Sure, Myself Brain Gonzalez.

ASSISTANT: Thanks for your details, there are no flights found on your data.

USER: No issue, Thank you for the information.

ASSISTANT: Thank you.